screenshooter: Grab pixel data directly before buffer swap
diff --git a/protocol/screenshooter.xml b/protocol/screenshooter.xml
index 1487c6d..76e3c85 100644
--- a/protocol/screenshooter.xml
+++ b/protocol/screenshooter.xml
@@ -5,6 +5,8 @@
       <arg name="output" type="object" interface="wl_output"/>
       <arg name="buffer" type="object" interface="wl_buffer"/>
     </request>
+    <event name="done">
+    </event>
   </interface>
 
 </protocol>